I came across this info about Dual Conversion Gain or Dual Base ISO or Dual Native ISO. I thought it would be interesting for everyone to see.
In most cameras there is a base ISO and another at a higher base ISO (my camera's base ISO is 100 ISO and the second base ISO is 400), noise level drops drastically at 400 ISO. Look at the link below, of the chart, to see you cameras second base ISO.
I tested this by taking a number of shots with the same shutter speed and same aperture with a lens cap on in Raw. I took shots, increasing my ISO from 100 to 1600 ISO for every 1/3 stops. I then brought them into Lightroom and increased the exposure as high as I could (+5) and I also tightly cropped all the same, to display the camera noise at the different ISOs.
The two frames below show a dramatic drop in noise at 400 ISO. The first photo is at 320 ISO and the next one is at 400 ISO. ( I also noticed that when I uploaded these two jpeg examples, some of the noise didn't show up, but looking at the Raw images in Lightroom, it is much more apparent.
Noise at 320 ISO
Almost no noise at 400 ISO
This shot was taken at 400 ISO in not very good light with no noise reduction, I just adjusted the brightness and it is tightly cropped. (ISO 800 looks better ISO 250 on my camera)
This video is a great explaination of noise generated from the camera sensors and processors
This chart show where the Dual Conversion Gain is on your cameras. There is a list of cameras to pick from on the right side.
The chart is for all cameras, not only Sony (click on the link below)
In most cameras there is a base ISO and another at a higher base ISO (my camera's base ISO is 100 ISO and the second base ISO is 400), noise level drops drastically at 400 ISO. Look at the link below, of the chart, to see you cameras second base ISO.
I tested this by taking a number of shots with the same shutter speed and same aperture with a lens cap on in Raw. I took shots, increasing my ISO from 100 to 1600 ISO for every 1/3 stops. I then brought them into Lightroom and increased the exposure as high as I could (+5) and I also tightly cropped all the same, to display the camera noise at the different ISOs.
The two frames below show a dramatic drop in noise at 400 ISO. The first photo is at 320 ISO and the next one is at 400 ISO. ( I also noticed that when I uploaded these two jpeg examples, some of the noise didn't show up, but looking at the Raw images in Lightroom, it is much more apparent.
Noise at 320 ISO
You can only see EXIF info for this image if you are logged in.
Almost no noise at 400 ISO
You can only see EXIF info for this image if you are logged in.
This shot was taken at 400 ISO in not very good light with no noise reduction, I just adjusted the brightness and it is tightly cropped. (ISO 800 looks better ISO 250 on my camera)
You can only see EXIF info for this image if you are logged in.
This video is a great explaination of noise generated from the camera sensors and processors
This chart show where the Dual Conversion Gain is on your cameras. There is a list of cameras to pick from on the right side.
The chart is for all cameras, not only Sony (click on the link below)
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